[The characteristics of conducting aviation medical expertise and dynamic medical observation of flight personnel with differing ocular refraction]. / Nekotorye osobennosti provedeniia vrachebno-letnoi ekspertizy i dinamicheskogo vrachebnogo nabliudeniia za litsami letnogo sostava s razlichnoi refraktsiei glaz.

The principal techniques are systematized and implemented in examination of the visual analyser's functions in the professional aircrew. New techniques such as, for instance, visocontranstoperimetry are presented. The need for an investigation to be conducted on frequency-contrast sensitivity of the eyes is emphasized, as is continuity of methods for examination of flying personnel, beginning from troop section and ending with specialized aircraft medical centre. The authors make practical recommendations on activation and rehabilitation of the degraded visual functions in flying personnel (<> of accommodation, optico-distant blurring/obscuring, accomodoconvergentraining, autotraining of external ocular muscles and some other nontraditonal methods, prophylactic treatment with biostimulators and drug preparations aimed at improvement of metabolic processes in the visual analyzer structures, and some others).

[Morphometry of living and metal salt impregnated nerve fibers]. / Morfometriia perezhivaiushchikh i impregnirovannykh soliami metallov nervnykh volokon.

Quantitative comparison on diameter distribution of some structures in vital and fixed neuronal fibres treated with salts of heavy metals has been performed. Rabbit and frog myelin fibres of the ischiadic and vagal nerves impregnated after Bielschowsky--Gross, fixed in 12% neutral formalin and treated after Gomori for acid phosphotase with fixation in cooled acetone have been studied. The diameters of neuronal fibres, axial cylinders and cords have been measured through the microscope with an ocular micrometer. Quantitative comparison of survived and fixed fibres has demonstrated that in the preparations treated with silver and lead salts, as a rule, not the whole fibre is demonstrable, not its axial cylinder, but only a part of the axial cylinder, namely, its centrally situated filamentous cord. It is most probable that, in this case, the axial cord formation is connected with the effect of fixatives. However, axial cord formation is possible in vital, nonfixed fibres in the zone of intersections and swollen incisions. The working hypothesis explaining this phenomenon is represented.